/Engine/Source/Runtime/Engine/Public/BoneContainer.h
Map mesh bone index to skeleton index
the skeleton pose bone index for the specified mesh pose bone index. Ensures and returns an invalid index if the skeleton does not include the specified mesh bone.
[FSkeletonPoseBoneIndex](API\Runtime\AnimationCore\FSkeletonPoseBoneIndex) GetSkeletonPoseIndexFromMeshPoseIndex ( const [FMeshPoseBoneIndex](API\Runtime\AnimationCore\FMeshPoseBoneIndex) & MeshIndex ) const